Apparatus for building cord tires



c. F, O FENSEND. APPARATUS FOR BUILDING CORD TIRES.

APPLICATION FILED AUG-26, [92L i Patented Feb. 7, 1922.

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C. F. OFENSEND.

APPARATUS APPLICAT FOR'BUILDING CORD TIRES. ION AFILED AUG=26, I921.

Pateht eb. 7,1922;

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C. F., OFENSENDL- APPARATUS FOR BUILDING CORD TIRES. APPLICATION FILED Aumze. 19.21'.

3 SHEETS Patented Feb. 7', .1922.

I I SHEET 3- Inventor.- C/ias e-F Ofensend,

tending web shaped on *its'oppos1te faces to tires.

UNITED STATES PATENT f OFFICE.

crrAsEr. OFENSEND, or AKRON, OHIO, ASSIGNOR T0 THE- ILLER RUBBER coMrANY,"

0F AKRON, OHIO, A coRPonA rIoNfoF 01110.

APPARATUS non BUILDING 00315; times.

Specification of Letters Patent. Patented Feb. 7, 1922 Original application filed May 6, 1921, Serial.No. ,467,413. Divided and this application filed August as, 1921. Serie1,No.-495,485. Y

7 '0 all whom it may concern:

Be it known that I, CHAsE F. OFENsEND, a citizen of the United States, and resident of Akron, in the county of Summit and State of Ohio, have invented ,certain new Buildin Cord Tires, of which the following Heretofore, in the manufacture of such tires, it has been customary to apply the tire forming material, including the cord structure or cord' fabric, to, or build it upon,qa

' metal core, and, after it is properly formed,

to remove the carcass from the core. An expansible air bag of ring form is then inserted in the carcass, which latter is placed in the mold and the bag inflated to stretch the cord fabric and cause the carcass to snugly fit the mold.

This methodof procedure has many objections, including the extra work required in removing the core from the unvulcanized tire body, and the insertion of the air bag therein, which itis the object of the present invention to avoid.

' an elastic core vupon which the tire is built.

The invention includes the novel apparatus for manufacturing cord'tires as hereinafter described and particularly defined-by the appended claims.

In the drawingv Figure 1 is a side elevation of the core. Fig. 2 is a section on line 22 of Fig. 1. Fig. 3 is an enlarged transverse section through one side of the core with the tire therein in position within a' mold before stretching the tire, and

Fig. 4 is a similar'view with the corebag expanded to stretch the tire. Figs. 5 to 8 inclusive-are modifications. I p

For carrying out my invention, I provide detail views of which core comprises a ring-shaped member 1 having a relatively narrow-inwardly ex receive the portions 2? of the mold sections 2. The ring member 1 hasoutwardly flarfor manufacturing cord as shown in Figs. 3 and 4;

ing walls -1 shaped to, give the proper for-u mation to the inner faces of the edge portions' of the tire, which tire isindicated by the numeral 3.

The ring '1 is provided with a peripheral seat, preferably of substantially the shape.

shown, including a central concave'portion 1 merging into the convex portions 1 upon which an endless elastic inflatable tube! mounted.

- This is provided with an inflating tube 4 Y passing thr ough an opening in thering and adapted to be detachably connected to any suitable source-of supply of fluid (such as air) under pressure.

The ring, web or inner edge with a grooved" designed to, be engaged by the ends of the arms of the customary tire building chuck in the manner well understood by those skilled in the art.-

As, the majority of cord tires -manufactured are of the inextensible edge .or.qu i ck. detachable type embodying inextensible bead rings in their edges, I make the rin I in the form of a sectional ring, or in other words, divide such ring into sections on. lines indicated at 1 in Fig.1,- and secure such ring sectionsin abutting position by suitable means engaging the inner portion ofthe web flange is provided at its" which lies within the inner face ofthe mold,

Such means may. conven ently I take the site faces of suclr we by'bolts 6.

.85 formof clamping rings'b'held against; oppo In 'pro'ceedingtd manufacture a tire-by my improved apparatus, I-.expand the bag, mounted on tlie sring, as shown 'iniFigs. 1

and 2, to the roper size,-to conforinfto the size of tire to e jbuilt thereon,- using a refit plate to determine when the core bag has been being mounted on a" suitable chuck, I. prowhen the material is .all 'assembledxthereon,

I place the core with '-the' 'ti rethereon .ina-

mold,.a's indicated inFig; 3. After the mold is closed, the. core. bag isinflated. to stretch the cord fabric. and expand the tire fromthe positionshown.inFig. 3lto that shown in "Fig, 4, and. thereafter :the pressure maintained during the vulcamzlationofthe' tire-by heat appliedsto their! the .cus-.

tomary manner. After vulcanization iscomplete; themold is opened, the coreremoved jfrom the tire, and a fresh tire' built thereon. "To obviate any separation of the bag from f the metal part 1 due to'distortion of the bag 'by air pressure I make'the bag with quite thick walls as shown; which, inconnection -with the formo-fsheet shown, prevents any of anembedded wire bead l, as shown n danger of separation.

As a further guard against separation, I may provide theinner annular face of the tube; or thatportion adjacent. the core ring 1; 'with reinforcing layers of fabric, as-indicatedat 4:", as shown in Fig. 5, and may provide a further reinforcement in theshape nother manner of securing thi result is shownin 1F ig. 7, in which the walls of the bag ad'acent the edges of the core ring are "made much thicker, as indicated at 4n Still another modificationis shown in Fig. 8,in" which] the side edges of the corering are chamfere'd or reversely beveled, as indic'ated'at 1-, and the bag correspondingly shaped',*providin'g the thickened portion 4 Having thus described my invention, what 4 ll plaim is: I

ring shaped former having a relatively nar row annular inwardly extending web and butwardly flaringside walls for shaping the anner'faces'ofthe bead carrying portions of a tire, sald ring core havlng on lts 1111161" [face an annular chuck arm engaging recess havinga concave peripheral seat, an endless elastic hollow core body carried by said seat, and inflating'means for such body.

2. A tire casing mold core for building tires embodying a sectional ring-shaped former having a'relatively narrow annular inwardly extending web having on its inner face an annular chuck arm engaging recess and having outwardly flaringside walls for shaping the inner faces of the bead carrying portions of a tire, meanscooperating withssaid web for holdlng thering sect ons 1111 ring shape during the t1re bulldmg operation, said ring sections having a con cave peripheral an endless elastic hol- A tire casing mold core embodying a low. core body carried 'bysaidseat, and inflating means for such body.

,3. A tire casing mold core embodying a sectional ring-shaped former having a relatively narrow annular inwardly extending web having on its inner face chuck arm e'ngaging means and outwardly flaring side, walls for shaping the inner faces of the bead carrying portions of a tire, meanscooperating with said web for holding the ring sections in assembled position priorto insertion inthe mold, said ring sections having a substantially concave peripheral seat, an endle'ss elastic hollow core body carried by said seat, and inflating means for such body.

4. A tire casing mold core embodying a ring shapedformerhaving a relatively narrow annular inwardly extendlng web and outwardly flaring side walls for shaping the inner faces of the bead carrying portions of a tire, said ring-shaped former having on its inner face chuck arm engaging means and having a concave peripheral seat, and

by said seata-nd having a 're'inforced'inner periphery.

5. A tirecfasing mold core embodying a ring-shaped former having a relatively narrow annular inwardly extending web andof a tire, said ring-shaped former having a an endless elastic hollow core body carried peripheral. seat, an endless elastic hollow core body carried by said seat, said ringshaped former having chamfered edges .and

said core body ,a reinforced inner periphery shaped to conform thereto.

- In testimony whereof I aflix my signature.

CHASE OFENSEND. 

